How to access Java3D classes (in JBuilder environment)

I've installed the Java3D package
(installation file: java3d-1_2_1_03-win32-opengl-sdk.exe), but when I compile an example program using the package, I get errors telling me that classes under the following packages cannot be accessed:

Who is Participating?

An easier way is to use "Tools | Configure Libraries | New" to get the New Libraries Wizard. You do not have to extract files from the jar files and it will be able to use documentation and source code as well.